Battery hand lamp



Dec. 14 1926.

. H. W. JONES BATTERY HAND LAMP Filed March .'51, 1926 `INVENTOR:

" 6A TToRNEYs.

Patented Dec.- 14,', 1926.

, tucasa `l-Jlxur'ia'n STATE-s @PATENT oF Fics. I

lHOMER WALTER JONEs, or JACKSON HEIGHTS, NEW YORK, AssIGNoR To NATIONAL CARBON COMPANY, INC., A CORPORATION OR NEW YORK.

BATTERY HAND LAME Application led March 3 1, 19526. `Serial No. 98,805.

This invention relates to battery hand lamps, flashlights and the like, and more particularly -to improved means whereby the reflector therein may be accurately positioned relatively to the lamp filament.

The 'filaments of the small incandescent lamps used inbattery hand -lamps are often not located'. exactly in the axis of the lamp.

When such lamps are) mounted in fixed rela-1 tion to the usual reflector, it Often happens thatv the majorpart or all of the ilame'nt is out of center with the reflector axis,

especially as there are also liable to be slight' inaccuracies in other parts of the hand lamp.

The reflected light beam may therefore be` distorted ordiflused when a concentrated beam is. desired.lv L

The objectof this invention is to compensat'efor such inaccuracies by providing f a hand vlamp in `which the relector is'adjustable transversely of the axis of the lamp so that -the axis of the reflector mayy be y positioned to pass through the y.central portion of the lamp filament.y

The above and other objects and the novel features of this. invention will be apparent from the following description, taken with, the drawings, in which: 1 y

Fig. 1 is-a central longitudinal sectlonal view of a hand lamp/embodying my invention, and V yFig. J2 is a detail sectional view on the line 2-2 of Fig. 1.. v f In the drawings, C designates the usual tubular casing of metal .or fiber that contains a battery B of cylindrical dry cells to furnish the current to light the filament of the -incandescent lamp L. The rear en'dv an axially adjustable lamp holder H for a lamp L having a 4larnent L. The center electrode B ofv the battery engages the contact J which is carried by the lamp holder on the front end of the casing'- H. 1 The battery and lamp holder are ad- Justable axially of the caslng as a unit by the rotation of the bottom cap 11,-a spring i 4S being compressedduring orward'movement of the lam'p holder, and expanding to move the holder and lamp in the reverse` direction. -The guide G hals .aaring porvt1on 16 that closes the end of the tube T, and a cylindrical portion 17 of the guide lssecured `to the inner wall of the tube, as by `rlvets or indentations 18. A flange 19 vn the part 17 enga'ges the end ofthe tube.

The guide and lamp holder .assembly are more fully shown and described in an application Ser. No. 96,598, iled Mar. 22,1926, in the name of Ralph RfSmith.

- The reflector 'and lens assembl lis carried by means of a sleevel litting F which is ythreaded'at 2Ork to interit with the threaded part 13.

The Outerextremity of the sleeve F has an Out-'turned flange 22 that provides a seat or 'supporting surfacevvv for the annular "washer'23 upon' which seats the peripheral ange 24 ofthe reflector R. The lens or cover glass E rests 4on the -lange'24,'-the lens E, 4reflector R and vwasher 23 being normally clamped tightly 'against the flange'22 by thel lens ringN. vThe lens ring has-an inwardly tapered lpart 26 which engages the outer beveled periphery of thelens E, land at its Opposite end has a threaded skirt sol 27 that is ada ted to interfit'with a simi- A larly threade vportion of an adjustable locking ringK. The locking ring K surrounds the sleeve F within the rngN and `just b ehindtheA exteriorl lian e 22, and its end is arranged to frictional y engage the latter to securely hold` the reector and lens assembly in any adjusted position when the lens rin sleeve F desirably has two diametrica'lly located ribs` 30M-adapted to -fit into dialmetrically disposed recesses 31 in the locking ring K to keep thelatter from turning` when the lens ring N` is screwed onto and oil' of the ring K. .A A

Between. its taperng part 26 and threaded skirt 27 the lens ring N has an interior groove 28 that is sufficiently deep to receive and retain the Outerperipheral edge of the annular washer 23 to prevent the accidental separation of the reflector and lens from.

.the ring N when the latter iszremoved from the..casing. v` However, the outer `edge'of the washer is sufficiently flexible so that it may be forced at will inwardly over the shoulder' loosened, to be shifted a short distance latmounted in the lamp holder.

erally in any direction to position the axis of the reflector in line with the center of the lament L of the particular lamp that is During such lateral adjustment the'focal axis of the reflector is at all times parallel to the longitudinal axis of the lamp. To determine the most desirable position for the reflector, the lamp is lighted and by trial, i. e. by setting the reflector in a number of different positions, that position should be selected which produces the narrowest possible beam: of light. During this adjustment of the lens ring, reflector and lens, the lens ring is un-v Ascrewed to sufficientlyA loosen the locking ring K so that thelatter may be shifted laterally with the reflector and lens ring. When'the desired lateral adjustment of the reflector has been obtained, the lens ring is f' screwed inwardly along the locking ringl which, when tightened, draws the end of the latter firml against the under side of the flange 22. %Vhenever a new lamp is inserted in the holder H to replace a defective or broken lamp, the foregoing adjustment of the reflector is repeated, in order to place the axis of the reflector in line with the central portion of the filament of the new lamp. The lamp and its holder may then be adjusted in either direction along the reflector axis by turning the bottom cap v11 in the proper direction.

Various changes may be madein the details of the structure shown without departing .front the rinciples of the invention. For example, ot er means may be employed for focusing the lamp longitudinally, and. the cooperating lens ring and locking ring ma take other forms. claim: 1. A battery hand lamp comprising the combination of a casing; an incandescent lamp mounted therein; a reflector having its focal axis atall times parallel to the longitudinal axis of said lamp but laterally adjustable relatively to said lamp axis; a lens ring adjustable with said reflector; and means operable to clamp said ring and reflector in any of their adjusted positions.

2. A battery hand lamp comprising the combination of a casing having a flange; an incandescent lamp mounted 1n said casmg; a reflector having its focal axis at all times parallel to the longitudinal axis of said lam but laterally adjustable relatively 'to said lamp axis; a lens in front of saidreflector; a lens ring laterally adjustable with said reflector; and a ring cooperating with said flange and said lens ring to clamp said reflector' in any one of its adjusted ositions. 3. A battery hand lamp comprising the combination of a casing carrying aflange; an incandescent lamp mountedin said casing; a reflector laterally adjustable relatively to the longitudinal axis of said lamp;

a lens ring laterally adjustable with said reflector; and a clamping ring engaging said lens ring and bearing against said flange to secure said reflector in any one of its adjusted positions.

4. A battery hand lamp according to claim 3, wherein said clamping ring and said lens ring are connected together by interfitting threads.

5. A battery hand lamp according to claim 3, wherein said flange projects outwardly and said lens ring has a groove facing said flange. f A

6. A battery hand lamp according to claim 3, wherein said lens ring has a threaded skirt, said reflector is seated on one side of said flange, and said clamping ring engages the other side of said flange and has threads interfitting with said threaded skirt.

7. A battery hand lamp according t0 claim 3, wherein said clamping ring is axially adjustable along said casing but non-rotatable relatively thereto.

8. A battery hand lamp comprising the `combination of a casing; a sleeve remov- .flange and a threaded skirt adjacent said groove; and a clamping ring disposed witllin said lens ring, engagin the other side of said flange and having t reads interfitting with said threaded skirt, said sleeve having rib means and said clamping ring having recess means fitting said rib means, whereby said clamping'ring is adjustable axially of said sleeve but held against rotation.

9. A battery hand lamp comprising the combination of. a casing; an incandescent Y lamp mounted therein; means adapted to adjust said lamp longitudinally of its axis; a reflector laterally adjustable relatively to the longitudinal axis of said lamp; a lens ring adjustable with said reflector; and means operable to clamp said ring and reflector in any of their adjusted positions.

10. A battery hand lamp comprising the combination of a casing; a sleeve removably coupled to said casing; an incandescent lamp mounted in said casin coaxial with said sleeve; a reflector carrie by said sleeve and laterally adjustable relatively to the axis of said sleeve and said lamp; a ring carried by said sleeve and adjustable laterally thereof with said reflector; and means operable to clamp said ring and reflector in I0 any of their adjusted positions. t

In testimony whereof, I ax my signature.

HOMER WALTER JONES. 

